Paradigm X30 crossover problem??


I dont know if this has happened to anyone else with their X30, but I have noticed that for the last couple of days, I was getting a heavy rumbling sound from my speakers every once in a while. Its not a constant thing, and it sounds like low frequency feedback of somesort.

My setup is this: M-Audio Audiophile 2496 soundcard -> Hafler DH100 preamp -> Into a Paradigm X30 crossover which splits the signal to a sub and an amp driving some bookshelf speakers. The amp is set on the 80Hz 'pot' on the X30.

In trouble shooting, I discovered that the problem of the noise came from the X30, specifically at the 80Hz pot. At the 50 Hz and 120Hz pot I dont hear any sort of feedback noise, but at the 80Hz pot, it is quite prevelant.

Can there be a workaround for this? The 80Hz pot is the pot I want to use as the bookshelf speakers are small so that 50 Hz may trouble them, but 80Hz and up should be fine.

I was wondering if by putting RCA caps on the other pots or an interconnect joining the left and right channels of the othe pots, acting like a jumper, could make a difference or if it would damage the X30.

Any help would be much appreciated.

D
eccbo
Thanks for the response.

Yes it will be for the Missions. I would have preferred the 80Hz mark so to use less output from the sub and probably slightly better integration, but you have a good point.

The cut off points are sharp enough though. I experimented once using my NHT ST4s on the 50 Hz setting and was surprised as to how much low end information was lost just for general listening. And I dont think I listen to music with much under 40 Hz.

But the 120 Hz setting should be fine. I still have the problem of the feedback though. And I would love to get rid of it big time, just in case. Its like I can only use two thirds of the potential of the X30!

D
If these are the Mission speakers you have listed in your system...I would use the 120hz high pass outputs. The Paradigm will not sharply cut off signals below 80hz so a good amount of low freq is still going to your Missions.

I found this regarding the Missions: Each m30i features a 3.93-inch DiaDrive bass unit.

The 80hz setting would be better used with larger bookshelf speakers that have strong output to at least 60hz.

Dave